Automatic regulator for power-pumps.



No. 777,541. PATENTED DEC. 13, 1904.

P. E. REED.

AUTOMATIC REGULATOR FOR POWER PUMPS.

APPLIUATION FILED SEPT. 26, 1903.

N0 MODEL.

Smuento; If

' @Hmiun s UNITED STATES Patented December 13, 1904.

PATENT OFFICE.

AUTOMATIC) REGULATOR FOR POWER-PUMPS.

SPECIFICATION forming part of Letters Patent No. 777,541, dated December 13, 1904. Application filed September 26, 1903. Serial No. 174,792. (No model.)

To (Li/Z whom it may concern/.- Be it known that 1, FRANK E. REED, a citizen of the United States, residing at Wilmington, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Automatic Regulators for Power-Pumps, of which the following is a specification.

My invention is an improvement in automatic regulators for power-pumps, the object of my invention being to regulate the pressure applied by means of said pump by means of the pressure of the fluid forced through the pump.

A further object of my invention is to provide means for adjusting the device so that the amount of work performed by the pump can be fixed and the pump held to that amount with but slight variation therefrom.

My invention consists in the novel features of construction and combination of parts hereinafter described, particularly pointed out in the claims, and shown in the accompanying drawings, in which Figure 1 is a side elevation of my device. Fig. 2 is a plan view of my device. Fig. 3 is a longitudinal section, parts being in elevation. Fig. t is a perspective view showing the means for attaching a lever to the pistonrod, the parts being detached. Fig. 5 is a perspective view of the guide rods and bracket. Fig. 6 is a perspective view of the removable cylinder-head and washer. Figs. 7 and 8 are perspective views of the cylinder. Fig. 9 is a perspective View of the yoke.

In constructing my device I employ a cylindrical casing A, preferably of brass and having a threaded socket A at its forward end and a longitudinal bore A opening at its forward end into the socket and at its rear end being threaded.

An integral bracket A extends laterally from the cylinderA on one side, and from the opposite side extends a perforated lug A. A squared lug A depends from the cylinder. The bracket A has upper and lower perforations A, by which it is secured to any convenient portion of the pump-frame B or to other suitable support, according to the surroundings and the nature of the pumping operation.

A guide-bracket (J has a central perforztion C and rearwardly-extending guide-rods which have shoulders 0 adjacent their forward ends and are threaded on their rear portions.

The combined piston and piston-rod I) is cylindrical in form and adapted to fit snugly in the aperture A Its rear portion is smooth and the forward portion threaded, and an annular shoulder D is arranged intermediate the two portions. A bifurcated bracket D has a socket at its rear end, into which the forward end of the piston is threaded. The bracket A and lug A have apertures A in horizontal alincn'ient with each other, and the smooth portions of the rods C 01 the bracket 0 slide in these apertures. A cylinder-head E has a threaded shank fitting the socket A and a bore E alining with the bore A of the cylinder. The piston 1) slides in the bores A E, the shoulder 1) bearing against the bracket (1 and the threaded portion D ex tending through the aperture 0 and being threaded into the socket of the bracket D, the bifurcated portion. of which is pivoted to a lever F. A washer is arranged in the socket A to the rear of the shank of the cylinder-head E. A bent arm G is bolted at its rear end to the lug A and is bifurcated at its forward end, and in this bifurcated portion is pivoted the lower end of the lever F.

A yoke H comprises the central circular portion, having the annular flange H and having on opposite sides the horizontally-extending lugs H These lugs are perforated and are adapted to slide on the rods (1 A coiled spring J encircles the cylinder A and bears at its forward end on the bracket A and lug A, and at its rear end encircles the flange H and bears on the yoke H. A pipe K, connected at one end to the discharge-pipe of a pump, extends through an aperture H in the central portion of the yoke and has its forward end threaded into the rear end of the bore A A. bracketL has the lower end of a belt-shifter L pivoted to it. This shifter is adapted to throw a belt L from a loose pulthreaded ends of the rods G ley L to a tight pulley L adapted to set in l motion the mechanism operating the pump. A link M is pivoted at one end to the upper end of the lever and at the opposite end to the shifter L.

Before describing the operation of my device it may be stated that the movable parts are the combined piston and rod D and the parts connected thereto, including the guidebracket C and yoke H, lever F, link M, and belt-shifter, the other parts remaining stationary. The yoke is held on the guide-rods and limited as to its rear movement along them by suitable jam-nuts O, secured on the Rearward movement of the guide rods is limited by the shoulders C contacting with the bracket A and lugs A and forward movement is resisted by the spring J bearing on the yoke H. The tension of this spring is regulated by the jam-nuts 0*, as by means of them the yoke may be advanced nearer to the cylinder and the spring subjected to greater compression.

The pipe K is connected to the pipe through which the fluid is being pumped, and the pressure of same on the piston will hold the belt on the loose pulley by forcing forward the piston and brackets D and C. On decrease of pressure the tension of the spring J will force the yoke back, drawing rearward the movable parts and shifting the belt to the tight pulley, starting the pump again, starting an extra pump, or in any desired manner bringing the pressure up to the required standard.

It will be obvious that in a hydraulic pump if the desired pressure is to be three thousand five hundred pounds and the spring J is regulated for said pressure the pump will work until the said pressure is reached, when the belt will be shifted to the loose pulley and the pump stopped. Should the pressure fall below that limit, the action of the spring would draw the belt back to the tight pulley, again starting the pump.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A device of the kind described comprising an essentially U-shaped guide-bracket, a stationary cylinder of less length than the bracket arranged between the side members of the guide-bracket, an adjustable yoke connecting the side members of the bracket to the rear of the cylinder, a pipe opening at one end into the rear end of the cylinder and having communication with a discharge-pipe from a power-pump, a combined piston and rod in said cylinder and connected to the bracket in advance of the cylinder and adapted to move the bracket with reference to the cylinder, means for guiding said bracket, a spring arranged in the rear of the cylinder and bearing at one end on the cylinder and at the opposite end on the yoke, a belt-shifting device, and means connecting the bracket to said device whereby movement of the bracket will actuate said device.

2. A device of the kind described comprising a discharge-pipe leading from a powerpump, a second pipe leading from the discharge-pipe, a stationary cylinder connected at one end to said second pipe, a piston and piston-rod working in said cylinder, a bracket and lug integral with said cylinder and having-apertures therein, a bracket connected to the piston-rod and having guide-rods sliding in the apertures mentioned, a yoke sliding in said guide-rods to the rear of the piston, a coiled spring bearing at one end on the bracket and lug formed on the cylinder, and at the opposite end on the yoke, adjustable means for limiting rear movement of said yoke, means for limiting rearward movement of the pistonrod, a belt-shifting device and means whereby movement of the piston will operate said dev1ce.

3. A device of the kind described comprising a cylinder having a longitudinal bore and a threaded socket at its forward end, a removable oylinder-head threaded into said socket, a combined piston and piston-rod working therethrough, a laterally-extending bracket integral with the cylinder and adapted to be secured to a suitable frame, a lug on the side of the cylinder opposite the bracket, said bracket and lug having apertures therein, a guide-bracket carried by the piston-rod, guiderods extending rearwardly from the guidebracket one on each side of the cylinder, said rods sliding in the apertures mentioned, the rear portions of said rods being threaded, a yoke sliding on said rods to the rear of the cylinder, jam-nuts working on the threaded portions of said rods and adapted to limit rear movement of the yoke, a coiled spring arranged between the guide-rods and hearing at one end on the bracket and lug carried by the cylinder and at the opposite end on the yoke, means for admitting fluid under pressure into the cylinder, in the rear of the piston, and means whereby movement of the piston will shift a belt.

FRANK E. REED.

Witnesses:

H. BURR ORANDALL, H. R. BANCOFT. 

